import java.util.Scanner;

public class ZouYeSan {
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("请输入千克数");
        double a=input.nextDouble();
        double b=0.4535924,c=a/b;
        System.out.print(c);
        System.out.println("英镑");
    }
}
